Russia appears to be preparing for war as troops have lined up on the North Korea border just one day after Vladimir Putin’s nation fired a ballistic missile. A large number of soldiers were seen arriving near the Khasan crossing point between the two nations on Tuesday. Photos captured some of the troops patrolling the top of Zaozyonara Hill, a meeting point between Russia, North Korea and China. Russia is thought to be concerned at the build-up of US troops in South Korea as Donald Trump and Kim Jong-un continue their war of words. Moscow has previously denied moved more troops to the border area as tensions between the US and Kim’s regime reach boiling point. Earlier this year, the movement of heavy weaponry towards the border was also caught on camera. Frants Klintsevich, the first deputy chairman of the Russian upper house’s Committee on Defence and Security, has warned that any US action against North Korea would also be seen as a hostility towards Russia due to their shared border.